Oil-well jack.



H. E. BROWN.

OIL WELL JACK.

APPLICATION FILED MAY 5. 191-2.

Patented Jan. 22

2 5HEETSSHEET I.

l/VVE/VTOR #5 Brown;

AJTOR/QEYS H. E. BROWN.

OIL WELLJACK.

APPLICATION FILED MAY 5, 19 l7.

2 SHEETS- 1 Ill/MENTOR 'f/f Brow Patented Jan. 22,1918.

SHEET 2-" insists.

nanny E. shown", or aoeusra, Kansas.

OIL-WELL JACK.

Specification of Letters Patent Patented Jan. 22, rats Application filedmay 5, 1917. Serial No. 166,690.

To all whom it may concern."

Beit known thatI, HARRY E. Brown, a citizen of the United States, and aresident of Augusta, in the county of Butler and State of Kansas, haveinvented a new and Improved Oil-'Well Jack, of which the following is afull, clear, and exact description.

My invention relates more particularly to jacks for operating wrenches1n couplmg and uncoupling the drill rods of oil wells but is useful inconnection with hoist or' track jacks and other tools. With one knownform of jack for example, in operating on drill rods, it is customary toapply to the respective rod sections to be coupled or uncoupled, twowrench bars, anda curved 'rack bar or sector is fastened in positionconcentric with the drill rod. The wrench bars are engaged with thedrill rod sections at one end, the opposite end of one wrench I barbeing engaged against a permanent stop,

lib

while the other wrench bar is moved over the sector by a jack whichincludes a can riage and a lever, the lever actuating pawls to advancethe carriage and with it the movable wrench bar.

An object of my invention is to provide an improved lever mechanism forthe jack -whereby the leverage may be compounded when desired, oradgusted to give direct ac tion..

A further object of the invention is to provide a novel detachable bracefor the sector. v

The invention. will be particularly eX- plained in the specificdescription following.

Reference is had to the accompanying drawings forming part of thisspecification, in which similar characters of reference indicatecorresponding parts in all the views, and in which:

Figure 1 isa plan view'of an oil well jack to which my invention hasbeen applied;

Fig. 2 is a vertical section on the line 22 of Fig. 1; a

3 is a vertical section. of the jack taken at right angles to the line2-2, and on an enlarged scale, showing a portion of the sector;

Fig. 4 is a section on the line 44: of Fig. 3;

Fig. 5 is a side elevation of the jack on a reduced scale with the levermechanism adjusted as in Figs. 8 and 4:; and

Fig. 6 is a sectional side elevation with the lever mechanism adjusteddifferently from the positions shown in Figs. 3 and 4.,

In Figs. 1 and 2 A, A represent adjacent drill sections to be coupled oruncoupled; 10 represents one of the usual wrench bars having a head 11to engage one drill rod section A, and 12 indicates the movable wrenchbar having a head 13, to engage the adjacent drill rod sectionA. Thewrench bar 10 at the end opposite the drill rod is. engaged with anyfixed stop or shoulder 15 on the toothed sector 14:, while that end ofthe movable wrench bar 12 opposite to the drill rod is engaged by theforward end of the jack carriage 16. v

In. my improved jack a lever 17 is employed and may include any approvedsocket remo'vably receiving a handle 17. The lever 17 includes,furthermore, in accordance with my invention, an auxiliary-lever 18 andthe two are arranged for joint movement as a unitary lover or forrelative movement in compounding, as will appear. The fulcrum for thelever is obtained by a transverse pin 19 which passes through theauxiliary lover or head 18 and the sides of the carriage 16, saidcarriage being longitudinally slotted as at 16 to receive the lever. Asis usual, the lever is equipped with a pair of pawls 20, 2]., pivotedrespectively as at 22, :23, to the auxiliary lever 18 above and belowthe fulcrum pin .19, so that in the rocking of the lever the pawls willalternately engage the teeth of the sector 14. In order that the pawls20, 21, have more reliable engagement with the sector, they are formedas multiple dogs. Thus each pawl includes "forked. or

Similarly, the pawl 21 has an integral forked or double toothed dog 21thereonand a single dog 21" pivotedbetween the teeth of the dog 21 as at21. The multiple dogs thus providednot only insure engagement with theteeth of the sector at all times, but the strain is distributed betweenthe several dogs, and the life of a pawl is thus prolonged, since thebreaking of one dog or tooth does not throw the jabk out of action. Inorder to provide for the peration of the lever 17 and the auxiliarylever 18 as a unitary lever of the first class, or to provide forcompounding the leverage by givlever 18, connection between therespective lever members is effected as follows:

. The auxiliary lever 18 is formed with a flaring socket 26. receivingthe end of main lever section 17 and a transverse pin 21 is carried bythe lever 17. Said pin has rollers 24 at the ends which may roll inlongitudinal slots 25 in the upper end of the auxiliary lever 18, theslots being oblique or inclined to the longitudinal axis of the lever tolessen the frictional engagement with the rollers. Below the pin 24means is provided t0 variously connect the main lever section 17 and theauxiliary lever section 18, said means including a removable pin 27adapted to be placed in two positions to connect the lever sections witheach'other the pin 27 constitutes a fulcrum for said main sectionconverting the same into a lever of the second order exerting its forcethrough the pin 24 and rollers 24 against the walls of the slots 25 andthereby rocking the auxiliary lever 18, which is permitted freedom ofmovement on its fulcrum 19 by reason of the slots 32 in said auxiliaryleve On the other hand, the pin 27'may establish a rigid relationbetween the main lever section 17 and the auxiliary section 18, so thatthe same will jointly constitute a lever of the first order rocking onthe fulcrum 19 only, for which purpose pin holes 28 are formed in thewalls of the section 18, a pin hole 29 is formed in the main section 17to be brought into alinement with the holes 28, and slots 30, are formedin the walls of the carriage 16. Thus, as the unitary lever rocks on itsfulcrum 19, the pin 27 may have play in the said slots 30 ofthe'carriage.

Ordinarily the direct leverage will suffice,

' but an increased power, with a slower speed of the carriage, may beobtained by compounding the leverage in placing the pin 27 in the upperposition shown in Figs. .3, 4 and 5.

Instead of fastening the sector to the platform of the well, I providean improved brace with means to detachably engage the same with thedrill rod and with the sector. The brace, indicated generally by thenumeral 34, rises at one end and has an offset 34: which receives a head35 raised to receive the coupling of the drill rod, so that the bracelies snugly against the said drill rod. "The opposite end of the bracecomprises diverging side arms 36 and a central arm 37. The arm 37 isbraced by a diagonal bar 38 riveted to the brace 34 at the rise thereofand inclining to a point adjacent to the outer end of the arm 37 towhich it is' riveted or otherwise secured as at 38. The head 35 isadjustable, being formed with a slot 35 which receives a bolt 39. Theouter ends of the arms 36 are formed with hook members 10, and the endsof the sector are received between said hooks and'studs or equivalentelements 41 on the said arms, said studs presenting shoulders at theside thereof opposite the hooks 40. 011 the outer end of the arm 37 asimilar hook 40 is formed, and the central portion of the seetor isreceived between said hook and the shoulder 41 presented by the adjacentend of the rod 38.

I desire to explain-further with respect to the movements to be impartedby the lever devices that in addition to the direct and indirect actionsdescribed, a modification of the movement imparted by the single leveris possible since the stroke thereof may be varied to give either a fullstroke for advancing the distance of a tooth at one time, or a strokeimparting movement the distance of half a tooth.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is:

1. A wrench ack including a carriage adapted to travel on the wrenchsector, a lever mounted. on the carriage and pawls on the lever toengage the wrench sector, said lever comprising a main lever and anauxiliary lever, the latter carrying the said pawls; together with meansto connect said levers to operate in unison as a single lever or tocompound the leverage and cause the main lever to relatively rock theauxiliary lever. u

2. Ina jack, a carriage, a lever comprising a main and an auxiliarylever and means to connect said levers to operate in unison as a singlelever. or to connect the levers so that the main lever rocks theauxiliary lever relatively to the main lever; together with means toactuate the carriage by the movements of the said lever.

means to actuate the carriage by the movements of the said lever.

4. A jack comprising a carriage, a main lever, an auxiliary leverfulcrumed on. the carriage, pawls on said auxiliary lever to engage arack, means forming a slot and pin connection between the levers, andmeans adapted to fulcrum the main lever on the stuxiliarylever and causethe slot and pin connection toactuate the auxiliary lever or to rock thelevers to move as a single lever on the fulcrum of the auxiliary lever.5. A well jack including a carriage, a lever fulcrnmed on said carriage,and a, pair of pa-wli pivoted on said lever at opposite sides of itsfulcrum for engaging a, rack, each of said pawls comprisinga dog" infixedrelation to the pawl and a dog. pivoted on the pawl. v k

6. in a wrench of the class described, at

sector and a-braee to detachebly brace the sector against a drill rod,the said brace comprising a. body presenting arms and e heed extendingin the opposite direction from the. arms and having a recess to engage adrill rod, said head bei g'adjnsteble upon HARRY .E. nno.

